Are "working copies", "project files" and "editing files" the same thing?

Question

Hello.
I have just joined the Adobe Forums as a newbie starting right at the bottom. I am still unfamiliar with the terms "working copies", "project files" and "editing files".
I wonder if someone will help me to know the difference between these terms.
I have just started the Dreamweaver tutorial, "Creating your first website, Part 1: Set up your site and project files" (http://www.adobe.com/devnet/dreamweaver/articles/first_website_pt1.htm).
The tutorial read, "You've now defined a local site folder for the Check Magazine site. This is where you keep the working copies of web pages on your local computer.".
Are "working copies", "project files" and "editing files" the same thing?

Answer 1

Murray *ACP* wrote:
Why would the raid level make any difference at all?  My data files are all stored on a RAID 4 system and seems to do pretty well.
Murray *ACP*,
If I may elaborate on this,
being completely new to Dreamweaver, my reason for having wondered whether it would be a good idea or a bad idea to have these files on disks that are in RAID 0, was because the term project files in the Dreamweaver Tutorial had me thinking of Premiere Pro project files and the performance increase working with such project files in a RAID 0 setup, which (provided there is backup) is especially beneficial if you have large or complex projects, long time-lines and a tight deadline,
especially considering that as fill rates of disks go up, and as the number of disk activities on a disk go up, performance goes down, sometimes by 50%, and that the more tracks you have in your project, the more strain is put on your disk, and the more applications you have open, the more your pagefile is used, especially on systems with limited memory.
Therefore, as RAID 0 offers the best performance increase over a single disk,  I immediately thought of the concept of project files related to Premiere Pro when I came across the term project files in the Dreamweaver Tutorial, being unfamiliar with the definition of project files in Dreamweaver world, hence my need to define project files related to Dreamweaver with reference to disk setup and file management.
However, if I understand correctly, my conclusion is that RAID 0 is not necessary for Dreamweaver project files, since the local site is not disk intensive, unless you have a huge website to build ?
Also, if I understand correctly, in website design, you want to minimize local files and use your hosting company to store and retrieve info from ?